blob: 3ed9557245072791335d29a7d44114ba009487f6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup obj
*/
#include "BKE_object.h"
#include "BLI_math_vector.h"
#include "DNA_curve_types.h"
#include "importer_mesh_utils.hh"
#include "obj_import_nurbs.hh"
#include "obj_import_objects.hh"
namespace blender::io::obj {
Object *CurveFromGeometry::create_curve(Main *bmain, const OBJImportParams &import_params)
{
std::string ob_name{curve_geometry_.geometry_name_};
if (ob_name.empty() && !curve_geometry_.nurbs_element_.group_.empty()) {
ob_name = curve_geometry_.nurbs_element_.group_;
}
if (ob_name.empty()) {
ob_name = "Untitled";
}
BLI_assert(!curve_geometry_.nurbs_element_.curv_indices.is_empty());
Curve *curve = BKE_curve_add(bmain, ob_name.c_str(), OB_CURVES_LEGACY);
Object *obj = BKE_object_add_only_object(bmain, OB_CURVES_LEGACY, ob_name.c_str());
curve->flag = CU_3D;
curve->resolu = curve->resolv = 12;
/* Only one NURBS spline will be created in the curve object. */
curve->actnu = 0;
Nurb *nurb = static_cast<Nurb *>(MEM_callocN(sizeof(Nurb), "OBJ import NURBS curve"));
BLI_addtail(BKE_curve_nurbs_get(curve), nurb);
create_nurbs(curve);
obj->data = curve;
transform_object(obj, import_params);
return obj;
}
void CurveFromGeometry::create_nurbs(Curve *curve)
{
const NurbsElement &nurbs_geometry = curve_geometry_.nurbs_element_;
Nurb *nurb = static_cast<Nurb *>(curve->nurb.first);
nurb->type = CU_NURBS;
nurb->flag = CU_3D;
nurb->next = nurb->prev = nullptr;
/* BKE_nurb_points_add later on will update pntsu. If this were set to total curv points,
* we get double the total points in viewport. */
nurb->pntsu = 0;
/* Total points = pntsu * pntsv. */
nurb->pntsv = 1;
nurb->orderu = nurb->orderv = (nurbs_geometry.degree + 1 > SHRT_MAX) ? 4 :
nurbs_geometry.degree + 1;
nurb->resolu = nurb->resolv = curve->resolu;
const int64_t tot_vert{nurbs_geometry.curv_indices.size()};
BKE_nurb_points_add(nurb, tot_vert);
for (int i = 0; i < tot_vert; i++) {
BPoint &bpoint = nurb->bp[i];
copy_v3_v3(bpoint.vec, global_vertices_.vertices[nurbs_geometry.curv_indices[i]]);
bpoint.vec[3] = 1.0f;
bpoint.weight = 1.0f;
}
BKE_nurb_knot_calc_u(nurb);
bool do_endpoints = false;
int deg1 = nurbs_geometry.degree + 1;
if (nurbs_geometry.parm.size() >= deg1 * 2) {
do_endpoints = true;
for (int i = 0; i < deg1; ++i) {
if (abs(nurbs_geometry.parm[i]) > 0.0001f) {
do_endpoints = false;
break;
}
if (abs(nurbs_geometry.parm[nurbs_geometry.parm.size() - 1 - i] - 1.0f) > 0.0001f) {
do_endpoints = false;
break;
}
}
}
if (do_endpoints) {
nurb->flagu = CU_NURB_ENDPOINT;
}
}
} // namespace blender::io::obj
|
